hamilton



(No Model.)

D. WHITTAKER 55 L. H. HAMILTON.

. STONE SEPARATOR. I No. 455,575.

Patented July 7. 1891.

w: mams ravens co.. moro-urne.,

UNITED STATES` PATENT OFFICE.

DAVID IVHITTAKER AND lLOUIS H. HAMILTON, OFMILVAKEE,VISOONSIN, ASSIGNORSTO THE lVHlT-TAKER STONE SEPARATOR COMPANY, OF SAME PLACE.

sToN E-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 455,375, dated July 7,1891.

Application filed April 22, 1890.

To all whom) it 77mg/ concern: p

Be it known that we, DAVID WHITTAKER and LOUIS H. HAMILTON, ofMilwaukee, in the county of Milwaukee and State of Tis- 5 consin, haveinvented new and useful Improvements inA Stone-Separators; and we dohereby declare the following to be a full, clear, and exactdescriptionof said invention, reference being had to the accompanying drawings,

" [o and io the letters of reference marked thereon, which form a partof this specification.

In the preparation of clay as taken from its bed in the earth formanufacturing brick,

tile, or other articles it is necessary to sepa- 15 rate and removetherefrom the pebbles or stone, 1f any therein; and our .inventionrelates to a machine constructed and adapted for separating and removingsuch pebbles or stones, or irreducible lumpy material. there- 2o from.

The machine is adapted for working the clay and removing the pebblesorstones therefrom, ordinarily, in the condition in which it `1s whentaken from the ground; but iftoo -2 5 hard for easy working then withthe addition of such water as may b e required to reduce the clay to aplastic consistency.

The invention consists of mechanism for forcing the material through themachine, a means for automatically separating the pebbles or stones fromlthe clay, a pocket or aux- 1l1ary receptacle in which the pebblesorstones are accumulated, and means for removing` them from the machine.I I

In the drawings, Figure l is an elevation of oui` complete machine. Fig.2 is a central vertical section of the same machine. Fig. 3 is a bottomview of the separator. Fig. L is a transverse section ot' the separatoron line 4 4 of Fig. 2, looking downwardly.

A is a frame on which the operative mechanism 1s supported. A case B,advisably in cylindrical form and having a funnel-shaped top O, issupported on the frame A, preferably vertically, and at its lower endopens mto an auxiliary receptacle D, also preferably made in thecylindrical form. The receptacleD is provided with sliding doors E E andwith a large number of apertures F F, preferably elongated slots, formedin the vveniently in frustoconical form, forming a serai No. 348.963.'N0 model.)

sides of the receptacle, advisably in the walls of the receptacle, andalso in the doors E E. The central part of the bottom of the receptacleD is thrown upwardly a distance conchamb'er G in the receptacle D at theside of and below the top of the re-cntering part of the bottom of thereceptacle. The bottom of the receptacle consistsv of the outer bottompart H, of the inner upwardly-extending circular wall I, and the top K.The part Hof the bottom is provided with gates or slides H. The top K ofthe re-entering part of the bottom of the receptacle is provided with alarge number of apertures L L, preferably constructed as elongated slotsand. advisably arranged in circles therein, whereby this portion ofthebottom is adapted for and becomes a screen. The bottom H and thegates H therein are also slotted or perforated. The top or screen of there-entering part of the bottom is of about the same diameterhorizontally as the diameter of the case B:

A revoluble shaft M is located centrally of the case B and has ajournal-bearing in the 7 5 top K and another journal-bearing in theframe A. This shaft is provided with a beveled wheel N, meshing with apinion O on a driving-shaft. An intermediate j ournal-bearing P ispreferably provided in the lower part of the case for the shaftrM tostill further Isteady and support the shaft.` The shaft is also providedwith a screw R, which may be either in` continuous form or in a seriesof screw-blades,'extending without intermission or with but smallseparations from the funnel down nearly to its lower extremity. Thisscrew is adapted as the shaft is rotated to force the contents of thecase downwardly therein, and partly into the receptacle D and partly outthrough the apertures.

A scraper S, consisting of two laterally-extending armsadvisablyreversely curved outwardly, rearwardly with reference to theirline of rotary motion, is fixed on the lower end of 95 the shaft M justabove the screen K. IVe also preferablyprovide radial arms T T, fixed inthe shaft M near the top of the receptacle D, which arms carry rigidthereon the downwardly-projecting blades U U, inclined rearroo wardly totheir line of rotary motion. These blades U U are located outside thecircle described by the screw R and above the annular chamber G. Thesearms T T, with their blades UU, are not necessary to the complete andsuccessful working of the machine, and their omission does not with mostqualities of material detract from or reduce the efficiency of themachine. A tank V is located below th e receptacle D to receive the claydischarged therefrom.

The operation of this device is as follows: A supply of plastic claycontaining pebbles or stones is fed into the case B through the funnelC, and as the shaft M rotates the mass of clay and contained pebbles iscarried downwardly against the top K of the re-entering part of thebottom of the receptacle D, through which it mostly passes, therevolving scraper S serving to constantly keep the surface of the top Kcomparatively clean, forcing the pebbles and stones laterally toward thesides of the receptacle, while tlieconstantly-renewed supply of clayforced downwardly by the screw M presses against and passes through thescreen K, falling into the tank V. As the pebbles and stones are forcedoff the screen' K laterally toward the side Walls of the receptacle Dthey fall iutothe chamber G, and as this chamber fills up with stones,pebbles, and a certain portion of the clay that is forced laterally offthe screen K by the scraper S the plastic clay will, by reason of thepressure on the material in the machine, be forced out through theapertures iii the sides of the receptaele D and through the apertures inthe bottom H and gates II. Vlien a considerable supply of pebbles andstones has accumulated in the auxiliary receptacle D, either in thechamber G or above it, the doors E E in the sides of the receptacle ofthe gates I-I II in the bottom, or both, may be opened and the stonesand pebbles removed from the receptacle.

Vhat We claim as neW,and desire to secure by Letters Patent, is

l. In a stone-separator, the combination, with a suitable case, a feeddevice therein arranged to force the material through the case in thedirection of its length, and a screen at the discharging end of the feeddevice arranged at right angles to and across the direct line ofmovement of the material through the case, the apertures through thescreen being of a size to permit the passage of plastic clay and toprevent the passage of stones, of an auxiliary receptacle located at theside of and beyond the end of the feed device and of the screen,apertures in the Walls of the auxiliary receptacle to permit the passageof plastic clay and to prevent the passage of stones7 and/doorsin thewalls of the auxiliary receptacle for the removal of stones,substantially as described.

2. In a stone-separator, a case having a screen at its discharging end,a feed device, an automatically-operating cleaning device, and areceptacle at the discharging end of tlie case, adapted to receive andretain pebbles and stones and having apertures to permit the passagetherefrom of plastic clay, all coinbined substantially as described.

3. In a stone-separator, the combination, with a suitable case and atherein-revolving shaft and feed device, of a receptacle at thedischarging end of the case,which receptacle has a centrally re-enteringbottom, the re-entering part having a screen-top, and a scraper fixed tothe revolving shaft and located gust above the screen and adapted as theshaft revolves to clear the surface of the screen and to force pebblesand stones laterallybeyond the scraper, substantially as described.

4. In a stoneseparator, the combination, with acase, a tlierein-rotatingshaft and feed device, a screen at the end of the shaft across thedirect line of movement of material in the case, and a scraper fixed tothe shaft and adapted to automaticallyclear the screen of stones andforce them laterally therefrom, of an auxiliary receptacle-.at the sideof and beyond the screen, doors in the walls of the auxiliary receptaclefor the removal of stones, and other unclosed apertures in` the Walls ofthe receptacle for the passage of plastic clay only, substantially asdescribed.

5. In a stoneseparator having a suitable case and a revolving feed-screwtherein, the combination, with an auxiliary receptacle located at thelower terminal end of the feeding-screw, which receptacle has perforatedsides and sliding doors and a re-entering central part of its bottom, ofradial arms fixedin the shaft carrying inclined blades, as U IT,substantially as described. y

6. In a stone-separator, a receptacle, as D, having perforated sides andbottom and doors in the sides and bottom, the bottoni having are-entering central part, in combination with a scraper locatedimmediately above the topot the re-entering part of the bottom, radialarms, as T, carrying inclined blades, as U U, and means, substantiallyas described, for carrying and rotating the scraper and the arms and forreceiving and feeding the material into the machine.

In testimony whereof We affix our signatures in presence of twoWitnesses.

DAVID WHITIAKER. LOUIS IVI. HAMILTON.

\Vitnesses:

(3."1. BENEDICT, ANNA FAUsT.

ICO

TIO

